Forge



April1s,1933. Awc. ELZE A 1,904,421

I FORGE Filed April '7, 1931 INVENTOR WAL TER C ELZE through the furnace.

forge of predetermined size.

' in the provision 5 0 provi-sion of any Patented Apr. 18, 1933 iran STATES Pnxxilslar ortica .WALTER C. ELZE, 0F FOREST HILLS, NEW YORK, ASSIGNOR TO HAUCK MANUFACTURf (i `NGr COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION 0F NEW YORK FORGE Application lcd April 7,

i The invention relates to forges fired with gaseous fuels such as gas or atomized oil and preferably the latter.

It relates more espetype of forge and is of ci'ally to a portable in a prior U. S. Letters the nature se forth VPatent No. 1,670,561. The furnace disclosed nets of combustion to be largely spent by the time they reach the space immediately above x the mouth so that the working space in front the forge will remain comparatively cool The outgoing of and accessible to an operator.

furthermore, are more orless deflected away from the front of the forge.

|The present invention has for its object to more effectively confine the gaseous products of combustion within the furnace space provided to enhance thereby the heating effeet, as in the development within the said furnace space of a rotary motion of said gases rather than merely directing them Full advantage of the flame length may thus be had in causing it to travel over a maximum distance within a The novel construction results, also, in the velocityof such gases being more completely spent before theyreach the mouth of the forge.

A further object of the invention resides and arrangement of a furnace interior whereby the heated gaseous medium is directed substantially toward and over the articles retained on the hearth of the furnace and, also, in the provision and arrangement of a burner nozzle with respect to the said interior whereby a portion of the products of combustion are caused to recirculate within the interior of the furnace and the remainder travels forwardly in the direction of the outlet opening.

Another object of the invention resides in the arrangement of said outlet opening such that the outgoing gases are directed substantially vertically upward and without the further furnace elements,

Serial No. 528,295.

further object of the inventionv rewherein'the opening shall be solely at the top, there being r5t no front or lateral exit portions associated therewith.

In carrying out the invention, a casing of refractory material is designed to afford a heating chamber into which a flame is art?) ranged to be directed from a suitable burner suitably associated therewith. The said chamber in` cross-section' is' substantially semi-circular over its upper half and is also substantially semi-circular over its lower half, the radius of curvature of the latter, however, being greater than that of the former and the rear walls merging. Thereby the lower half may be caused toproject beyond the opening at the top in accordance with the displacement.'

An Ainlet directed substantially tangentially to the up? per half of the furnace space; and the wall providing the upper; semi-circular portion of the furnace space is, preferably, slightly beyond into :the lower semi-circular portion to check somewhat the outgoing products of combustion and assist in recirculating a portion of the incoming gaseous' products, the remainder traveling forwardly in the direction of the opening and then ver' tically upwardly through the same.

The nature of the invention, best be understood when described in connection with the accompanying drawing, in

which: f

Fig. 1 isa side elevation, partly in section,

of thenovel forge. v

Fig. 2 is a front elevation of the said forge.

- Referring to the drawing, 10 designates a suitable supporting frame upon which the I heating chamber and various rela-ted ap- 95 aratus of the forge is supported, including a fuel tank 11 which supplies liquid or gaseous fuel to a burner apparatus 12 attached to the baclrrof the-furnace portion proper.

The burner 12discharges into an inclined 100 upper half to afford a mouth or 'l duct to the furnace chamber iscontinued f however, will 85 duct or passageway 15 of the forge portion of the apparatus, which comprises a metalbound casing 16 of refractory material. Said duct, in turn, delivers the burner flame into a hollowed-out portion 17 of the casing 16, which in cross-section is substantially semi-circular. The hearth 1S of the forge is provided by a lower and also semi-circular hollowed-out portion 19 merging at the back of the furnace space into the portion 17 but in cross-section is of a larger radius of curvature than that of portion 17. Portion 19 is displaced, therefore, forwardly with respect to the portion 17 and affords thereby an outlet opening or mouth 20 through which the gaseous products of combustion may pass and through which articles to be heated, such as the rivets 21, may be inserted and removed. lt is to be understood that while the lower portion 19 has been shown as generally semi-circular in crosssection, the actual hearth portion thereof for receiving the articles need not be curved but may be constituted as a flat surface.

It is preferred, also, to continue the wall 22 bounding the hollowed-out portion 17 at its forward end slightly into the hollowedout portion 19. This will tend to check outgoing gases and assist in returning a portion of these gases, which have already acquired a circular motion, to the upper hollowed-out portion 17. The remainder of the gases continue forwardly about the lower end of wall 22 and are directed by the circular ower portion substantially vertically upwardly and outwardly through the mouth 20.

This permits of an operators approaching closely the mouth of the furnace from the front of the forge as the same is relatively cool and accessible for manipulation of the articles to be heated and the handling of the same on the hearth.

Furthermore, by causing the gases to recirculate in part, a more elevated temperature is attainable in the forge and a greater radiant effect on the materials therein is had. Due to the semi-circular construction set forth, the products of combustion are caused, also, to more or less directly impinge 0n and pass over the articles to be heated and thus a full benefit of the heating medium is attained.

I claim:

1. A forge comprising a casing of refractory material affording a heating chamber, said chamber in cross-section being substantially semi-circular over its upper half and substantially semi-circular over its lower half, the radius of curvature of the latter half being greater than that of the former with the rear walls of the two halves merging, whereby the lower half is caused to project beyond t-he upper half to afford a mouth opening at the top, an inlet duct located at the upper portion of the casing and directed half with the forward into the semi-circular upper half portion thereof and substantially tangentially thereto, and a burner discharging into said duct.

2. A forge comprising a casing of refractory material affording a heating chamber, said chamber in cross-section being substantially semi-circular over its upper half and substantially semi-circular over its lower wall of said upper half projecting slightly therein, the radius of curvature of the latter half being greater than that of the former with the rear walls of the two halves merging, whereby the lower half is caused to project beyond the upper half to afford a mouth opening at the top, au inlet duct located at the upper portion of the casing and directed into the semi-circular upper half portion thereof and substanti ally tangentially thereto, and a burner discharging in'to said duct.

In testimony whereof I affix my signature.

WALTER C. ELZE. 

